Normally you would not notice the colour when you put it straight into your tank, it is just that I pour it from the jerry can into a plastic bottle and as soon as I started to pour it I noticed it was colourless and then I had to think hard if I might have got fuel from the wrong pump. It doesn't smell like petrol, just some odd smell, and I didn't fill my car but I think I did earlier in the week and no probs so far Then this afternoon I had this mower dropped off because it wouldn't start so I put some of this clear fuel in it, still no start, so I was blaming the fuel. No fuel coming out of the drain plug on the fuel bowl I took the bowl off, needle was dropping down but no fuel flowing. Blew into the tank to put some pressure in it and then fuel started flowing, put the bowl back on and still no start. Check the valve clearances, ok, pull the plug, good spark, put it back in still no start I'm using the drill by this stage, sick of pulling it. Change the plug with an old one and it fired up instantly, so the fuel must be alright.